A junction between two adjoining cardiac muscle cells, containing desmosomes and gap junctions, is called what?

1. Cardiac muscle cells branch freely and connect end to end with their neighbours. 2. The junction marking this connection is called an intercalated disc. 3. It contains desmosomes, specialized proteoglycans, tight junctions, and gap junctions that help synchronize contraction. 4. A triad is a T-tubule/SR complex, a sarcomere is a contractile unit, and a T-tubule is a membrane invagination, none of which is the cell-to-cell junction described. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.2, p. 846_